Ati Technologies Inc.

Sanford S Lum

Adrian H Hartog

Dwayne R Bennett

Keping Chen

Michael A Alford

Fridtjof Martin Weigel

Edward George Callway

Dan O Gudmundson

Josh Grossman

Fridtjof Martin Georg Weigel

Jerzy Kielbasinski

Samuel L Wong

Samuel L C Wong

Samuel Lc Wong

The present invention relates to a video display processor comprised apparatus for receiving digital input signal components of a signal to be displayed, apparatus for converting the components to a desired format, apparatus for scaling and blending the signals in the desired format, apparatus for outputting the scaled and blended signals for display or further processing, and an arbiter and local timing apparatus for controlling the apparatus substantially independently of a host CPU.

Host CPU independent video processing unit

A method of providing text data for display in a processor controlled apparatus comprised of storing data defining a text character in a memory, in packed monochrome bit map form, addressing the memory to read the text character data, providing the text character to a graphics processor circuit, performing a bitblt operation on each bit of the text character while providing a color attribute, and storing the packed text character having a color attribute for subsequent display.

Text optimization

A method of addressing a computer subsystem memory comprised of establishing an aperture having a predetermined page size, addressing the memory at address boundaries defining multiples of half the page size, and reading or writing a page of data from or to the subsystem memory using the established aperture at consecutive memory locations beginning at one of the boundaries.

Page address space with varying page size and boundaries

A method of controlling the display of graphics data on a computer display, the computer comprising a draw engine, comprised of detecting predetermined logical condition of a draw operation for display, saving the state of the draw engine, performing a new draw operation, and restoring the state of the draw engine.

Device synchronization on a graphics accelerator

A method of performing a bit block transfer (Bitblt) comprised of reading a pixel data sequence from a source trajectory, writing an X coordinate portion of the pixel data sequence to a destination trajectory, repeating the writing step to the end of a scan line in the event the X coordinate portion is smaller than the scan line, reset the X coordinate following the end of the scan line, reset a Y coordinate and write a successive X coordinate portion of the pixel data sequence to the destination register from an X coordinate start position when the Y coordinate actually advances in the pixel data sequence.

General pattern blit source type

The present invention relates to an image scaler comprised of apparatus for receiving coefficients a and b and image display values of adjacent pixels P and Q respective of an image, apparatus for repeatedly operating on the coefficients and values for successive pixels according to the transform ##EQU1## where SUM is the sum of the coefficients,

Method and apparatus for scaling and blending an image to be displayed

The present invention relates to a method of converting signal components of one of a first input three component color model signal and a second input three component color model signal to either one of the first or second three component color model comprised of matrix multiplying input signal components with an array of predetermined transformation parameters to form a multiplied set, vector adding the multiplied set with a predetermined group of offset vectors, whereby signal components of the output signal are produced.

Programmable color space conversion unit

Enhancing each pixel of a digital color video image by, for each component part of a source pixel, successively adding a truncation error of an immediately preceding previous pixel in an X direction to a current pixel. A resulting value is truncated to form a truncation error and most significant bits, and the most significant bits are provided to a destination line.

Digital color video image enhancement for a diffusion dither circuit

The present invention relates to a method of enhancing a digital color video image comprised of separating a source pixel into individual component parts, for each component part, generating a random number having the same length as the corresponding component part, adding each random number to its corresponding component part to form resultant component parts, and combining the resultant component parts to form a destination pixel.

Digital color video image enhancement for a random dither circuit

The present invention relates to a method of processing video signals comprised of gamma correcting pixel data of a first signal, gamma correcting pixel data of a second signal, adding the gamma corrected first and second signals to form a sum signal, dividing the sum signal by a factor to form a processed signal, and reverse gamma correcting the processed signal, whereby merged pixel data is produced for generation of a display.

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Scarborough, Canada

Sanford S Lum